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People watch TV showing Dec. 12, 2012 file footage of the Unha rocket launching in North Korea, at Seoul Railway Station in Seoul, South Korea, Wednesday, Jan. 23, 2013. North Korea swiftly lashed out against the U.N. Security Council's condemnation of its December launch of a long-range rocket, saying Wednesday that it will strengthen its military defenses - including its nuclear weaponry - in response.(AP Photo/Ahn Young-joon)

People watch TV showing Dec. 12, 2012 file footage of the Unha rocket launching in North Korea, at Seoul Railway Station in Seoul, South Korea, Wednesday, Jan. 23, 2013. North Korea swiftly lashed out against the U.N. Security Council's condemnation of its December launch of a long-range rocket, saying Wednesday that it will strengthen its military defenses - including its nuclear weaponry - in response.(AP Photo/Ahn Young-joon)